即使未选中，复选框也始终返回true

Question

<input name="inform_me" id="inform_me" type="checkbox"> inform me

Whenever I check if this checkbox is set, I get

bool(true)

even if the checkbox is not really checked.

This is how my PHP looks like:

var_dump(isset($_POST['inform_me']));

What's wrong with it?

Answer 1

I found the solution. My problem was that I passed the variable $_POST['inform_me'] with Ajax. In Ajax I used data: { inform_me: $('#inform_me').val() } to get the value of the checkbox. Instead of .val() I am using .is(':checked') now and it works!